diff --git a/ChangeLog b/ChangeLog
index 3b276c7679..da8c6d7613 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Tue Jul  8 21:45:22 2008  Yusuke Endoh  <mame@tsg.ne.jp>
+
+	* vm.c (rb_vm_mark): mark the last element of special_exceptions.
+
 Tue Jul  8 19:55:40 2008  Masaki Suketa  <masaki.suketa@nifty.ne.jp>
 
 	* ext/win32ole/win32ole.c (find_default_source): try to
diff --git a/vm.c b/vm.c
index 4ffc8c8817..f7aec06234 100644
--- a/vm.c
+++ b/vm.c
@@ -1396,7 +1396,7 @@ rb_vm_mark(void *ptr)
 	RUBY_MARK_UNLESS_NULL(vm->loaded_features);
 	RUBY_MARK_UNLESS_NULL(vm->top_self);
 	RUBY_MARK_UNLESS_NULL(vm->coverages);
-	rb_gc_mark_locations(vm->special_exceptions, vm->special_exceptions + ruby_special_error_count - 1);
+	rb_gc_mark_locations(vm->special_exceptions, vm->special_exceptions + ruby_special_error_count);
 
 	if (vm->loading_table) {
 	    rb_mark_tbl(vm->loading_table);